Permission denied for a css when deploying to heroku

I have a sample app that is using compass gem including blueprint. I just开发者_JAVA百科 deployed this app on heroku for the first time and I'm seeing the following error in heroku logs

Errno::EACCES (Permission denied - /app/public/stylesheets/ie.css):

Is there something special required in my rails app that will make this error go away? I'm assuming it's coming because I'm using the compass gem...

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Do a compass compile before deploying to heroku.

Also, in your production.rb, add the following line:

Sass::Plugin.options[:never_update] = true

This will prevent compass from compiling css at runtime (since heroku does not allow writes on filesystem)

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Just set this option to true in config/environments/production.rb and everything will work fine:

config.assets.compile = true

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Save ie.css from your local machine, add it into your public/stylesheets folder, and push it up to heroku.